2022-08-04 15:29:38 +02:00
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[package]
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name = "tvix-eval"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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2022-09-03 18:40:01 +02:00
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[lib]
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name = "tvix_eval"
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2022-08-04 15:29:38 +02:00
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[dependencies]
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2022-12-29 12:44:09 +01:00
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backtrace-on-stack-overflow = { version = "0.2.0", optional = true }
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builtin-macros = { path = "./builtin-macros", package = "tvix-eval-builtin-macros" }
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2022-09-01 14:52:48 +02:00
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codemap = "0.1.3"
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2022-09-11 23:34:25 +02:00
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codemap-diagnostic = "0.1.1"
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2022-12-29 12:44:09 +01:00
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dirs = "4.0.0"
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2022-12-24 18:18:26 +01:00
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imbl = { version = "2.0", features = [ "serde" ] }
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feat(tvix/eval): use lexical-core to format float
Apparently our naive implementation of float formatting, which simply
used {:.5}, and trimmed trailing "0" strings not sufficient.
It wrongly trimmed numbers with zeroes but no decimal point, like
`10000` got trimmed to `1`.
Nix uses `std::to_string` on the double, which according to
https://en.cppreference.com/w/cpp/string/basic_string/to_string
is equivalent to `std::sprintf(buf, "%f", value)`.
https://en.cppreference.com/w/cpp/io/c/fprintf mentions this is treated
like this:
> Precision specifies the exact number of digits to appear after
> the decimal point character. The default precision is 6. In the
> alternative implementation decimal point character is written even if
> no digits follow it. For infinity and not-a-number conversion style
> see notes.
This doesn't seem to be the case though, and Nix uses scientific
notation in some cases.
There's a whole bunch of strategies to determine which is a more compact
notation, and which notation should be used for a given number.
https://github.com/rust-lang/rust/issues/24556 provides some pointers
into various rabbit holes for those interested.
This gist seems to be that currently a different formatting is not
exposed in rust directly, at least not for public consumption.
There is the
[lexical-core](https://github.com/Alexhuszagh/rust-lexical) crate
though, which provides a way to format floats with various strategies
and formats.
Change our implementation of `TotalDisplay` for the `Value::Float` case
to use that. We still need to do some post-processing, because Nix
always adds the sign in scientific notation (and there's no way to
configure lexical-core to do that), and lexical-core in some cases keeps
the trailing zeros.
Even with all that in place, there as a difference in `eval-okay-
fromjson.nix` (from tvix-tests), which I couldn't get to work. I updated
the fixture to a less problematic number.
With this, the testsuite passes again, and does for the upcoming CL
introducing builtins.fromTOML, and enabling the nix testsuite bits for
it, too.
Change-Id: Ie6fba5619e1d9fd7ce669a51594658b029057acc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7922
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
2023-01-24 19:27:20 +01:00
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lazy_static = "1.4.0"
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lexical-core = { version = "0.8.5", features = ["format", "parse-floats"] }
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2022-12-29 12:44:09 +01:00
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path-clean = "0.1"
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2022-09-17 19:52:02 +02:00
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proptest = { version = "1.0.0", default_features = false, features = ["std", "alloc", "break-dead-code", "tempfile"], optional = true }
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2022-10-13 00:45:52 +02:00
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regex = "1.6.0"
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2022-12-06 14:31:09 +01:00
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rnix = "0.11.0"
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2022-12-29 12:44:09 +01:00
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rowan = "*" # pinned by rnix
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2022-12-24 18:18:26 +01:00
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serde = { version = "1.0", features = [ "rc", "derive" ] }
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2022-12-29 12:44:09 +01:00
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serde_json = "1.0"
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smol_str = "0.1"
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tabwriter = "1.2"
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test-strategy = { version = "0.2.1", optional = true }
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2023-01-24 15:54:29 +01:00
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toml = "0.6.0"
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2023-01-15 12:52:37 +01:00
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xml-rs = "0.8.4"
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2022-08-10 17:52:42 +02:00
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[dev-dependencies]
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2022-12-16 12:54:22 +01:00
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criterion = "0.4"
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2022-08-16 14:33:50 +02:00
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pretty_assertions = "1.2.1"
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2022-09-02 21:02:19 +02:00
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itertools = "0.10.3"
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2022-09-03 17:42:27 +02:00
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tempdir = "0.3.7"
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2022-08-10 18:18:01 +02:00
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2022-12-18 15:23:35 +01:00
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[dev-dependencies.test-generator]
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# This fork of test-generator adds support for cargo workspaces, see
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# also https://github.com/frehberg/test-generator/pull/14
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git = "https://github.com/JamesGuthrie/test-generator.git"
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rev = "82e799979980962aec1aa324ec6e0e4cad781f41"
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2022-08-10 18:18:01 +02:00
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[features]
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2023-01-24 15:54:29 +01:00
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default = ["impure", "arbitrary", "nix_tests", "backtrace_overflow"]
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2022-09-03 18:40:01 +02:00
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2022-08-10 18:18:01 +02:00
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# Enables running the Nix language test suite from the original C++
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# Nix implementation (at version 2.3) against Tvix.
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nix_tests = []
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2022-08-25 17:04:07 +02:00
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2022-09-18 22:34:41 +02:00
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# Enables operations in the VM which depend on the ability to perform I/O
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impure = []
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2022-09-17 19:52:02 +02:00
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# Enables Arbitrary impls for internal types (required to run tests)
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2023-01-24 15:54:29 +01:00
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arbitrary = ["proptest", "test-strategy", "imbl/proptest"]
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2022-09-17 19:52:02 +02:00
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2022-11-23 04:42:06 +01:00
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# For debugging use only; not appropriate for production use.
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2023-01-24 15:54:29 +01:00
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backtrace_overflow = ["backtrace-on-stack-overflow"]
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2022-11-23 04:42:06 +01:00
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2022-08-25 17:04:07 +02:00
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[[bench]]
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name = "eval"
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harness = false
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